you can use Disk Management on Windows or Disk Utility on Mac to reformat the SD card. If the card isn’t recognized, try connecting it via another card reader. Formatting as FAT32 usually works for smaller cards, and exFAT for larger ones.
Basically, your SD card is giving you attitude. You either calm it down with proper formatting or buy a new one before it starts refusing to work entirely.
First, back up anything you can. If the card keeps failing, a low-level format tool like SD Formatter from the SD Association is the safest way to avoid damaging the storage.
I once tried using Windows format, it didn’t work. Then I used SD Formatter, and it recognized the card immediately. Make sure to select the ‘Overwrite format’ option if data recovery isn’t needed.
If normal formatting fails, check the card’s health with a tool like H2testw. Corrupted sectors might prevent standard formatting. For stubborn cards, low-level formatting through SD Formatter is the industry standard.